Neck neckline a circle of redness and itching, if it is contact dermatitis; should avoid contact with things, choose anti-allergy treatment measures; if it is ringworm, should be antifungal treatment; if it is solar dermatitis, should be avoided sun exposure, cold compresses, medication and other methods. 1. contact dermatitis: for example, wearing a necklace, or scarf, clothing and other substances caused by local allergies, first avoid re-exposure to allergenic substances, topical glycerine lotion, dexamethasone ointment and other medications; can also be taken orally loratadine, cetirizine and other antihistamine drugs. 2. ringworm: fungal infection caused by neck and neck dermatophytosis, can also cause skin redness, itching, can be used topical clotrimazole ointment, terbinafine cream and other antifungal drugs. 3. Solar dermatitis: If exposed to strong ultraviolet rays for a long time, it is easy to cause inflammatory reactions of the exposed skin, such as the neck will appear red, itchy symptoms. It is recommended to get out of the sun environment in time, first local cold compresses. If the symptoms are not relieved, you can also use boric acid solution wet compresses, glucocorticoid cream such as mometasone furoate cream coated, if necessary, combined oral antihistamine drugs such as cetirizine, loratadine. Neck neckline a circle of redness and itching, there may be other reasons, you need to go to the hospital for examination, clear cause of the treatment as prescribed by the doctor. The above medications should be used in accordance with medical advice.